Friction-clutch.



113. 757,236. PATENTED APR. 12, 1904.

-0. SBYBOLD. FRICTION CLUTCH.

nrmuumn 11mm mm: 22, 1903. no MODEL. 2 sums-sum 1.

7T1; fnasa es- No. 757,236. PATENTED APR.12,1904.

(LSBYBOLD.

FRICTION CLUTCH; v APPLIOATIOH 1111.21) JULY 2:, 1903.

"no 1011111.. I 2 sums-sum Patented April 12, 1904.

PATENT OFFICE.

OHARLESSEYBOLD, OF DAYTON, OHIO.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 757,236, dated April 12, 1904.

Application filed July 22, 1903. Serial No. 166,589. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES SEYBoLD, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Friction-Clutches, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

' My invention relates to friction-clutches for coupling together rotating shafts, pulleys, and the like, and it has relation to that class of friction-clutches in which a split band attached to one of the members is expanded within the rim on the. other member to couple.

the two parts together.

My improvements in the present instance have particular relation to that construction of clutch shown and described in my certain United States Patent No. 667 ,7 98, issued February 12, 1901, in which the rim or band instead of being rigidly secured or integral with one member was loosely secured thereto. My present invention consists in splitting or dividing up this band in order that greater freedom of play may be had between the expansion-band and the other clutch member.

The benefits arising from the use of a loosely-mounted rim or band, as stated in my patent above referred to, are still maintained in my present invention; but I have found that by splitting or dividing the rim and securing together the parts so as to allow them to give or play on each other to a certain extent a very perfect friction-clutch can be obtained, in which full accommodation is given for the differences in the centers of the rotat-. ing parts. The weight of the fly-wheel or pulley is in no way carried by the expansionband, and a perfect accommodation for the slightly-elliptical shape of the split band when expanded within the divided rim is obtained.

In the drawings, Figure 1 is a front elevation of my improved clutch. Fig. Qis a front view of the divided rim or band. Fig. 8 is a frontview of the fiy-wheel hub and inner portion of the spokes. Fig. I is adetail sectional 5 View on lines 4 4: of Fig. 1. Fig. 5 is a detail and hub b, mounted on the shaft B. Each of the spokes of the fly-wheel is provided with a lug 0, and upon these lugs a split or divided band C is secured by the screws d, the lugs c 0,

fitting between the shoulders e 6, formed on each section of the divided rim O at each point of attachment. The fit between these lugs and shoulders on the sections 'of the rim is not tight, however, and there is a play of from one sixteenth to one thirty-second of an inch between the vertical faces of the shoulders e e and the sides of the lugs 0 0, as indicated at a a in Fig. I. In this view, however, in order to make the matter clear in the drawings the looseness of fit is somewhat exaggerated. The holes ff in the attaching-lugs of the band-sections O are also enlarged around the shanks of the attaching-screws d, so that when the screws 0? hold the sections of the rim O on the fly-wheel no strain isbrought to bear on the screws.

In the drawings I have illustrated the band C as divided into halves. Each half-section is formed with the lugs 72. n and the sections are bolted together with the bolts p 19. The holes in the lug are counterbored except at the center, so as to allow play between the sections of the rim without straining the lugs or bolts, but at the same time to hold the sections true. In the drawings I have illustrated this counterboring by dotted lines, the looseness of fit being somewhat exaggerated to make the matter clear. I have found that by thus dividing the rim into halves and securing them together as described sufficient looseness of fit is obtained, although the band O might be divided into smaller segments than halves without departing from the spirit of my invention.

D is the expansion-band, located within the divided band C and secured by its hub E to the shaft B. This band is split at one side and the block g inserted therein'and pivoted on apin h, secured to an extension of the hub of the band. This block g carries an arm 71, provided with a set-screw Z. Mounted loosely on an extension of the hub on the expansion-band is a sliding collar F, grooved to receive the inner ends of the fork G, secured on the rock-shaft H. This sliding-collar carries a beveled pin m, which contacts with the inner end of the set-screw Z, as the sliding collar F is shifted to the expansion-band by rocking the rock-shaft H. In this way the inner end of the arm i is pressed outwardly to turn the block 9 on its pivot and to open out the expansion-band. K is a recess formed in the hub E to receive the pin m when thus actuated. This expansion-band arrangement is of the same construction as shown in my above-mentioned patent. As stated in said patent, while my present invention has particular relation to expansion-band clutches the invention is equally applicable to all the classes of friction-clutches, and while the invention has been illustrated with reference to a fly-wheel it is of course equally applicable to any arrangement of an expansion-band sections with the sections loosely secured together, and the band, thus united, loosely secured to one member, and an expansion-band secured to the other member, With means for expanding the band within the loosely-fitted rim to couple the members, substantially as described.

3. In a friction-clutch, the combination with a shaft, and an expansion-band secured thereto, of a fly-wheel loosely mounted on said shaft, and a secondary rim or band for the fly-wheel, said rim or band being divided into sections, with the sections loosely secured together, and the band thus united loosely fitted on said fly-wheel, within which loosely-fitted rim the expansion-band is mounted, and means for actuating said expansion-band to couple the shaft and fly-wheel, substantially as shown and described.

4. In a friction-clutch, a fly-wheel or pulley, carrying lugs on its spokes, and a ring divided into sections, with the sections loosely secured together, the ring thus united, provided with shoulders or projections fitting over said lugs, the space between the projections on the ring being greater than that between the side faces of the lugs, whereby play is permitted said ring, and screws for securing said ring to the fly-wheel, the apertures for which in the ring are enlarged to prevent any strain upon the screws, substantially as shown and described.

' CHARLES SEYBOLD.

Witnesses:

FRANK H. HERBST, HARRY Row. 

